Dinakar Singh.of TPG-Axon (Bloomberg)Dinakar Singh’s TPG-Axon Capital Management is off to a strong start this year after losing money in 2014. The New York hedge fund firm’s main funds — TPG-Axon Partners and TPG-Axon Partners (Offshore) — rose 3.6 percent and 3.8 percent, respectively, in March, and 5.2 percent and